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| Patents for Alexander Clark | |||||
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| Picture | Number | Date | Patentee | Title | |
| GB-186,600,377 | Feb. 07, 1866 | A. Clark | Improvements in machinery or apparatus for mortising or cutting holes or mortises in wood | ||
 | 119,821 | Oct. 10, 1871 | A. Clark | Improvement in mechanical movements | |